Are Claire Danes‘ luscious lashes giving her hell? The Emmy Award-winning actress joined Brooke Shields this summer as a celebrity spokesperson for Latisse, an eyelash growth treatment from the makers of Botox — but she seems to have suffered one of the product’s side effects.

Danes, in a flouncy dress, touts, “When Your Lashes Grow, Your Lashes Show,” while showing off longer, darker lashes in a TV and online commercial with the list of possible adverse reactions.

In a video diary on the Latisse Web site documenting her 16-week journey, Danes admitted, “When I first started using Latisse, I did actually have a side effect, the skin around my eyes was a little bit red that lasted for about a week. But since then, no, I haven’t had any side effects.”

However, a source claims that Danes’ makeup artist has to plaster on concealer to cover the purplish and yellowish shade. “It is hard to cover it up,” the source said.

A spokesperson for Latisse told Page Six, “We can only speak to what Claire has shared with us regarding her experience with Latisse, which is that she has been pleased with her results and continues to use the product. “Claire’s team has shared with us that she has not experienced skin hyperpigmentation following use of Latisse,” the spokesperson told us.

“Skin-darkening is a less common side effect . . . and typically occurs close to where Latisse is applied on the skin. This has been reported to be reversible in most patients upon discontinuation of Latisse.”

A rep for Danes insisted to us, “Your claims are entirely false. We will pursue legal action if you print anything to the contrary. This story should be killed.”